Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Anybody who can help me with a differential?
The book mentions that a differential is 111pi. However, the differential I worked out after 30 minutes solving was 1.7pi. The question was:
Estimate the change in the volume of a cylinder, if the radius increases from 30 to 30.2, and the height decreases from 10 to 9.99. (HINT: V=pi r^2 h)
3 Answers
- shihhua123Lv 41 decade agoFavorite Answer
dV
= d (pi r^2 h)
= pi d (r^2 h)
= pi (2rh dr + r^2 dh)
= pi [ 2*30*10*(0.2) + 30^2 *(-0.01) ]
= pi [ 120 - 9 ]
= 111 pi
